During breeding season the female may get a bit fatter when full of eggs, and the male will get breeding stars on it's gill plates and along the pectoral fins. These look like tiny white bumps.
Like goldfish
because it is a goldfish stupid
There is no apparent difference between male and female goldfish except during breeding season when the males develop white pimple like spots on their gill plates. Goldfish with the 'cap' are usually called 'orandas' If you 'google' it I'm sure you will be able to find pictures.
They look like they are tired but they aren't :)
They are a fancy goldfish (Carassius auratus). They were bred to have scales that look like pearls.
a female goldfish
YES
it means male and female will look for each other to mate.
Shubunkin is just a fancy name given to a specifically coloured Goldfish. Breeding one with a Golden coloured goldfish will result in about 33% that look like a Shubunkin and 33% that look like a Golden coloured goldfish and 33% that look like a mixture of the two. The above results would only be accurate if the breeder fish are properly line bred and their lineage is guaranteed. Otherwise you could get anything from coloured goldfish to uncoloured goldfish and a mixture of any kind of goldfish including Comets, Fantails and Veiltails.
junk
Like a gilbert that's what i named mine!
No. They stay gray their entire life.